The biggest animal living in the world today (and in fact the biggest ever to exist to our knowledge) is the blue whale. The official record for length of a blue whale is somewhat over 33 meters (110 feet). The heaviest weight is 210 tons for a pregnant female.

On land, the largest animal today is the elephant, and specifically the African elephant. These elephants can weigh up to 13 tons.

As far as the most loving, that would surely have to be a subjective answer. No one can measure what animal is most loving.

Of course, the blue whale would have paled in comparison to some of the dinosaurs that roamed the earth. The Bruhathkayosaurus (Titanosaur), estimated at 144 feet long and 220 tons, had a humerous--the forearm from shoulder to elbow--nearly seven feet long. The Seismosaurus (Diplodocid) was estimated at 148 feet or longer. The Supersaurus (Diplodocid), 131 feet long, was lighter at only about 50 tons. The Argentinasaurus (Titanosaur), 120 feet long, weighed in at about 100 tons. The Paralititan (Titanosaur), 114 feet long, was estimated at about 80 tons. The Brachiosaurus was the tallest at 43 feet high. The most loving? Why, that would be my little dachshund, Zoe (pictured).

The largest known animal on Earth is the blue whale. Mature blue whales can measure anywhere from 75 feet (23 m) to 100 feet (30.5 m) from head to tail, and can weigh as much as 150 tons (136 metric tons). That's as long as an 8- to 10-story building and as heavy as about 112 adult male giraffes! These days, most adult blue whales are only 75 to 80 feet long; whalers hunted down most of the super giants. Female blue whales generally weigh more than the males. The largest blue whale to date is a female that weighed 389,760 pounds (176,792 kg).